Tube-cutter.



J. P. KEENEY.

TUBE CUTTER.

APPLICATION FILED MAY 14, 1913 1,1 18,494. Patented Nov. 24, 1914.

2 SHEETS-SHEET 1.

V N N J. P. KEENEY. TUBE GUTTBR. APPLICATION FILED MAY 14.1913.

1 ,1 1 8,494 Patented Nov. 24, 191%.

2 SHEETS-SHEET 2 JOSEPH.PETER KEENEY, OF N QRFOLK, VIRGINIA.

TUBE-CUTTER.

Specification of LettersPatent.

Patented Nov. 24, 1914.

Application filed May 14, 1913. Serial No. 767,686.

To all whom it may concern:

Be it known t at I, JOSEPH P. KEENEY, a citizen of the United States,residing at Norfolk, in the county of Norfolk, State of Virginia, haveinvented certain new and useful Improvements in Tube-Cutters, of whichthe following is a description, reference being had to the accompanyingdrawingand to the figures of reference marked thereon.

The invention relates to new and useful improvements in tube cutters,and more es pecially to tube cutters wherein cutterscngage the innersurface of the tube and are forced outwardly against the tube during thecutting action. 1 a

An object of the invention is to provide a tube cutter of the abovecharacter wherein the carriers for the cutters are radially guided in acutter head, positively forced outwardly into contact with the tube tobe cut, and yieldingly withdrawn from contact with the tube or into thecutter head when released by the expanding member.

A further object of the invention is to provide a cutter for tubes,which shall be durable in construction, and which shall be of few partswhich may be readily assembled and taken apart for cleaning orrepairing.

These and other objects will in part be obvious, and will in part behereinafter more fully described.

In the drawings, which show by way of illustration one embodiment of theinvention,Figure 1 is a sectional view through a tube to be cut, showingmy improved cutter in side elevation; Fig. 2 is a longitudinal sectionalView through the cutter head; Fig. 3 is a perspective view, with theparts of the cutter head separated to show themembers within the same;Fig. 4 is a transverse sectional view through a tube, showing thecarriers for the cutter, the spring for retracting the same and themeans for e2 panding the cutters; and Fig. 5 1s a detail 1n perlspective, showing one of the cutter carriers and the rotating cuttertherefor.

The invention consists generally in providing a cylindrical cutter head,in which are formed a plurality of radially extending guide ways, eachof which is adapted to receive and guide a cutter-supporting carriage.In each carriage is a rotating cutter. These carriages are drawn towardthe center of the cutter head by springs and are forced outwardly intocontact with the tube to be cut by a cone-shaped expandingmember, whichis moved longitudinallyof the cutter head by a feed screw.

Referring morein detail to the drawings, my improved cutter for tubesconsists of a cutter head 1, into which is threaded or otherwise secureda tubular shank 2. This tubular shank is free from threads throughoutits entire length, and a feed screw 3 having through said tubular shank2.

This cutter head 1, as above noted, is cy-t lindrical in form, and ismade in two sections. The section 5 is formed with radially extendingguidcways 6, which are equally spaced, and, as herein shown, are four innumber. The section 7 of the cutter head is adapted to be secured to thesection 5 by suitable bolts 8, and this section 7 closes the radial.guidcways (3 and forms one wall of each guideway. Located within eachguideway 6 is a carriage 9. Each carriage is provided with outwardlyextending armslO, between which is located a rollercutter 11. Thisroller cutter is carried by a supporting shaft 12,. which is mounted inthe arms of the carrier. The arms 10 of the carriage are formed so as tofit within the guideway 6. These carriages are adapted to move radiallyin the guideways, butarepprevented from lateral or circular movement bythe arms of the carriages contacting with the side walls of theguideway.

The feed screw 3 is formed with a coneshaped section 13. ()n thiscone-shaped section 13 is a hardened steel sleeve 14, the outer face ofwhich is shaped as the frustum of a cone, and said sleeve is held on thefeed screw by a suitable nut 15 and a collar 16. The carriages 9 areadapted to rest on the outer face of the hardened steel sleeve. Theinner face of each carriage is curved, as at 17, (seeFigs. 4 and 5), soas to conform to the outer surface of the sleeve 14. The edges of thecarriage are cut away as at 18, so as to permit the sleeve to turnfreely on a supporting base on the carriage. Each carriage projectslaterally from the arms 10, and is formed with a groove 19 at each sideof said arms. Circular coiled springs 20 are disposed in the grooves 19,and yieldingly hold the carriages pressed against the sleeve 14.

The feed screw 3 is formed with a thread 21, which engages acorresponding thread a stem or operating shaft 4 extends.

feed screw, and by turning this hand wheel the threaded portion 21 willcause the cone 13 to travel longitudinally of the cutter head. When thecone is moved to the left, as shown in Fig. 2, the carriages will heforced outwardly through the radial guideways therefor, and the cutterscarried thereby will be caused to contact with the tube to be cut. Amovement of the hand wheel in the opposite direction, will move the coneto the right, as viewed in this figure, and allow the springs 20 toretract the carriages or draw the cutters toward the center of thecutter head.

The outer end of the tubular shank 2 is termed with a suitable collar23, which 00- operates with a suitable wrench or ratchet lever, wherebythe cutter head may be rotated to cut the tube.

In order to center the cutter head, so that the plane of cutting will beat right angles to the longitudinal axis of the tube, I have provided acentering collar 2 This collar is formed with a central opening whichengages the shankZ of the cutter head. Said collar is formed with acylindrical part 25, adapted to engage the inner face of the end of 'thetube, and a projecting flange 26, which holds said cente ing collar inproper relation to the end of the tube. This centering collar maintainsthe shank 2 in the center of the tube, and assists in positioning theparts during the first cutting action upon the tube.

At the opposite end of the feed screw irom the hand wheel 22 is a stopnut 27. This stop nut on the feed screw will prevent a the feed screwfrom being entirely withdrawn from the cutter head and the releasing ofthe parts.

It is obvious that minor changes in the details of construction may bemade, without departing from the spirit of the invention, as set forthin the appended claim.

Having thus described my invention, what I claim as new and'desire tosecure by Let ters Patent, is

A tube cutter including in combination a cylindrical cutter head formedin sections, one oi? which is provided with radially spaced guidewayswhich are closed by the other section, carriages mounted in saidguideways, a feed screw having a threaded engagement with. the cutterhead, a hardened cone sleeve carried by the feed screw and engaging thecarriages, means for detachably securing whereby when said teed screw isrotated, said 1. ardened sleeve moved endwiseo'f the cutter head, eachof said-carriages being curved to conform to said sleeite and eachcarriage having a lateral projection with I the groove therein forming aseat for a spring, and a coiled spring located in-the groove in eachcarriage for holdingthe carriages in contact with the sleeve.

in testimony whereof, I affix iny signa- '7? ture, in the presence oftwo witnesses.

J OSEPH PETER KEENEY.

Witnesses:

CHARLES K. Burrs, PERCY E. GREEN.

(topics of this patent may be obtainedfor five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

said sleeve to said teed screw cc

